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<a href="#GSimpleAction.synopsis" class="shortcut">Top</a>
                   | 
                  <a href="#GSimpleAction.description" class="shortcut">Description</a>
                   | 
                  <a href="#GSimpleAction.object-hierarchy" class="shortcut">Object Hierarchy</a>
                   | 
                  <a href="#GSimpleAction.implemented-interfaces" class="shortcut">Implemented Interfaces</a>
                   | 
                  <a href="#GSimpleAction.properties" class="shortcut">Properties</a>
                   | 
                  <a href="#GSimpleAction.signals" class="shortcut">Signals</a>
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<div class="refentry">
<a name="GSimpleAction"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GSimpleAction.top_of_page"></a>GSimpleAction</span></h2>
<p>GSimpleAction — A simple GAction implementation</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="GSimpleAction.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">                    <a class="link" href="GSimpleAction.html#GSimpleAction-struct" title="GSimpleAction">GSimpleAction</a>;

<a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="returnvalue">GSimpleAction</span></a> *     <a class="link" href="GSimpleAction.html#g-simple-action-new" title="g_simple_action_new ()">g_simple_action_new</a>                 (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
                                                         <em class="parameter"><code>const <a href="./../glib/glib/glib-GVariantType.html#GVariantType"><span class="type">GVariantType</span></a> *parameter_type</code></em>);
<a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="returnvalue">GSimpleAction</span></a> *     <a class="link" href="GSimpleAction.html#g-simple-action-new-stateful" title="g_simple_action_new_stateful ()">g_simple_action_new_stateful</a>        (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
                                                         <em class="parameter"><code>const <a href="./../glib/glib/glib-GVariantType.html#GVariantType"><span class="type">GVariantType</span></a> *parameter_type</code></em>,
                                                         <em class="parameter"><code><a href="./../glib/glib/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> *state</code></em>);

<span class="returnvalue">void</span>                <a class="link" href="GSimpleAction.html#g-simple-action-set-enabled" title="g_simple_action_set_enabled ()">g_simple_action_set_enabled</a>         (<em class="parameter"><code><a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="type">GSimpleAction</span></a> *simple</code></em>,
                                                         <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> enabled</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="GSimpleAction.html#g-simple-action-set-state" title="g_simple_action_set_state ()">g_simple_action_set_state</a>           (<em class="parameter"><code><a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="type">GSimpleAction</span></a> *simple</code></em>,
                                                         <em class="parameter"><code><a href="./../glib/glib/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> *value</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GSimpleAction.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
  <a href="./../gobject/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
   +----GSimpleAction
</pre>
</div>
<div class="refsect1">
<a name="GSimpleAction.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GSimpleAction implements
 <a class="link" href="GAction.html" title="GAction">GAction</a>.</p>
</div>
<div class="refsect1">
<a name="GSimpleAction.properties"></a><h2>Properties</h2>
<pre class="synopsis">
  "<a class="link" href="GSimpleAction.html#GSimpleAction--enabled" title='The "enabled" property'>enabled</a>"                  <a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write
  "<a class="link" href="GSimpleAction.html#GSimpleAction--name" title='The "name" property'>name</a>"                     <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>*                : Read / Write / Construct Only
  "<a class="link" href="GSimpleAction.html#GSimpleAction--parameter-type" title='The "parameter-type" property'>parameter-type</a>"           <a href="./../glib/glib/glib-GVariantType.html#GVariantType"><span class="type">GVariantType</span></a>*         : Read / Write / Construct Only
  "<a class="link" href="GSimpleAction.html#GSimpleAction--state" title='The "state" property'>state</a>"                    <a href="./../glib/glib/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a>*             : Read / Write
  "<a class="link" href="GSimpleAction.html#GSimpleAction--state-type" title='The "state-type" property'>state-type</a>"               <a href="./../glib/glib/glib-GVariantType.html#GVariantType"><span class="type">GVariantType</span></a>*         : Read
</pre>
</div>
<div class="refsect1">
<a name="GSimpleAction.signals"></a><h2>Signals</h2>
<pre class="synopsis">
  "<a class="link" href="GSimpleAction.html#GSimpleAction-activate" title='The "activate" signal'>activate</a>"                                       : <a href="./../gobject/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a>
  "<a class="link" href="GSimpleAction.html#GSimpleAction-change-state" title='The "change-state" signal'>change-state</a>"                                   : <a href="./../gobject/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a>
</pre>
</div>
<div class="refsect1">
<a name="GSimpleAction.description"></a><h2>Description</h2>
<p>
A <a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="type">GSimpleAction</span></a> is the obvious simple implementation of the <a class="link" href="GAction.html" title="GAction"><span class="type">GAction</span></a>
interface. This is the easiest way to create an action for purposes of
adding it to a <a class="link" href="GSimpleActionGroup.html" title="GSimpleActionGroup"><span class="type">GSimpleActionGroup</span></a>.
</p>
<p>
See also <a href="http://developer.gnome.org/gtk2/GtkAction.html"><span class="type">GtkAction</span></a>.
</p>
</div>
<div class="refsect1">
<a name="GSimpleAction.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GSimpleAction-struct"></a><h3>GSimpleAction</h3>
<pre class="programlisting">typedef struct _GSimpleAction GSimpleAction;</pre>
</div>
<hr>
<div class="refsect2">
<a name="g-simple-action-new"></a><h3>g_simple_action_new ()</h3>
<pre class="programlisting"><a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="returnvalue">GSimpleAction</span></a> *     g_simple_action_new                 (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
                                                         <em class="parameter"><code>const <a href="./../glib/glib/glib-GVariantType.html#GVariantType"><span class="type">GVariantType</span></a> *parameter_type</code></em>);</pre>
<p>
Creates a new action.
</p>
<p>
The created action is stateless.  See <a class="link" href="GSimpleAction.html#g-simple-action-new-stateful" title="g_simple_action_new_stateful ()"><code class="function">g_simple_action_new_stateful()</code></a>.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>the name of the action</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>parameter_type</code></em> :</span></p></td>
<td>the type of parameter to the activate function. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new <a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="type">GSimpleAction</span></a>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="g-simple-action-new-stateful"></a><h3>g_simple_action_new_stateful ()</h3>
<pre class="programlisting"><a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="returnvalue">GSimpleAction</span></a> *     g_simple_action_new_stateful        (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
                                                         <em class="parameter"><code>const <a href="./../glib/glib/glib-GVariantType.html#GVariantType"><span class="type">GVariantType</span></a> *parameter_type</code></em>,
                                                         <em class="parameter"><code><a href="./../glib/glib/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> *state</code></em>);</pre>
<p>
Creates a new stateful action.
</p>
<p>
<em class="parameter"><code>state</code></em> is the initial state of the action.  All future state values
must have the same <a href="./../glib/glib/glib-GVariantType.html#GVariantType"><span class="type">GVariantType</span></a> as the initial state.
</p>
<p>
If the <em class="parameter"><code>state</code></em> GVariant is floating, it is consumed.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>the name of the action</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>parameter_type</code></em> :</span></p></td>
<td>the type of the parameter to the activate function. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>state</code></em> :</span></p></td>
<td>the initial state of the action</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new <a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="type">GSimpleAction</span></a>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="g-simple-action-set-enabled"></a><h3>g_simple_action_set_enabled ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                g_simple_action_set_enabled         (<em class="parameter"><code><a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="type">GSimpleAction</span></a> *simple</code></em>,
                                                         <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> enabled</code></em>);</pre>
<p>
Sets the action as enabled or not.
</p>
<p>
An action must be enabled in order to be activated or in order to
have its state changed from outside callers.
</p>
<p>
This should only be called by the implementor of the action.  Users
of the action should not attempt to modify its enabled flag.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>simple</code></em> :</span></p></td>
<td>a <a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="type">GSimpleAction</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>enabled</code></em> :</span></p></td>
<td>whether the action is enabled</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="g-simple-action-set-state"></a><h3>g_simple_action_set_state ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                g_simple_action_set_state           (<em class="parameter"><code><a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="type">GSimpleAction</span></a> *simple</code></em>,
                                                         <em class="parameter"><code><a href="./../glib/glib/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> *value</code></em>);</pre>
<p>
Sets the state of the action.
</p>
<p>
This directly updates the 'state' property to the given value.
</p>
<p>
This should only be called by the implementor of the action.  Users
of the action should not attempt to directly modify the 'state'
property.  Instead, they should call <a class="link" href="GAction.html#g-action-change-state" title="g_action_change_state ()"><code class="function">g_action_change_state()</code></a> to
request the change.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>simple</code></em> :</span></p></td>
<td>a <a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="type">GSimpleAction</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>the new <a href="./../glib/glib/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> for the state</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.30</p>
</div>
</div>
<div class="refsect1">
<a name="GSimpleAction.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GSimpleAction--enabled"></a><h3>The <code class="literal">"enabled"</code> property</h3>
<pre class="programlisting">  "enabled"                  <a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write</pre>
<p>
If <em class="parameter"><code>action</code></em> is currently enabled.
</p>
<p>
If the action is disabled then calls to <a class="link" href="GAction.html#g-action-activate" title="g_action_activate ()"><code class="function">g_action_activate()</code></a> and
<a class="link" href="GAction.html#g-action-change-state" title="g_action_change_state ()"><code class="function">g_action_change_state()</code></a> have no effect.
</p>
<p>Default value: TRUE</p>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="GSimpleAction--name"></a><h3>The <code class="literal">"name"</code> property</h3>
<pre class="programlisting">  "name"                     <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>*                : Read / Write / Construct Only</pre>
<p>
The name of the action.  This is mostly meaningful for identifying
the action once it has been added to a <a class="link" href="GSimpleActionGroup.html" title="GSimpleActionGroup"><span class="type">GSimpleActionGroup</span></a>.
</p>
<p>Default value: NULL</p>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="GSimpleAction--parameter-type"></a><h3>The <code class="literal">"parameter-type"</code> property</h3>
<pre class="programlisting">  "parameter-type"           <a href="./../glib/glib/glib-GVariantType.html#GVariantType"><span class="type">GVariantType</span></a>*         : Read / Write / Construct Only</pre>
<p>
The type of the parameter that must be given when activating the
action.
</p>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="GSimpleAction--state"></a><h3>The <code class="literal">"state"</code> property</h3>
<pre class="programlisting">  "state"                    <a href="./../glib/glib/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a>*             : Read / Write</pre>
<p>
The state of the action, or <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if the action is stateless.
</p>
<p>Allowed values: GVariant&lt;*&gt;</p>
<p>Default value: NULL</p>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="GSimpleAction--state-type"></a><h3>The <code class="literal">"state-type"</code> property</h3>
<pre class="programlisting">  "state-type"               <a href="./../glib/glib/glib-GVariantType.html#GVariantType"><span class="type">GVariantType</span></a>*         : Read</pre>
<p>
The <a href="./../glib/glib/glib-GVariantType.html#GVariantType"><span class="type">GVariantType</span></a> of the state that the action has, or <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if the
action is stateless.
</p>
<p class="since">Since 2.28</p>
</div>
</div>
<div class="refsect1">
<a name="GSimpleAction.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="GSimpleAction-activate"></a><h3>The <code class="literal">"activate"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="type">GSimpleAction</span></a> *simple,
                                                        <a href="./../glib/glib/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a>      *parameter,
                                                        <a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>       user_data)      : <a href="./../gobject/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a></pre>
<p>
Indicates that the action was just activated.
</p>
<p>
<em class="parameter"><code>parameter</code></em> will always be of the expected type.  In the event that
an incorrect type was given, no signal will be emitted.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>simple</code></em> :</span></p></td>
<td>the <a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="type">GSimpleAction</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>parameter</code></em> :</span></p></td>
<td>the parameter to the activation. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="GSimpleAction-change-state"></a><h3>The <code class="literal">"change-state"</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                user_function                      (<a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="type">GSimpleAction</span></a> *simple,
                                                        <a href="./../glib/glib/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a>      *value,
                                                        <a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>       user_data)      : <a href="./../gobject/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a></pre>
<p>
Indicates that the action just received a request to change its
state.
</p>
<p>
<em class="parameter"><code>value</code></em> will always be of the correct state type.  In the event that
an incorrect type was given, no signal will be emitted.
</p>
<p>
If no handler is connected to this signal then the default
behaviour is to call <a class="link" href="GSimpleAction.html#g-simple-action-set-state" title="g_simple_action_set_state ()"><code class="function">g_simple_action_set_state()</code></a> to set the state
to the requested value.  If you connect a signal handler then no
default action is taken.  If the state should change then you must
call <a class="link" href="GSimpleAction.html#g-simple-action-set-state" title="g_simple_action_set_state ()"><code class="function">g_simple_action_set_state()</code></a> from the handler.
</p>
<p>
</p>
<div class="example">
<a name="idp67003536"></a><p class="title"><b>Example 22. Example 'change-state' handler</b></p>
<div class="example-contents">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1
2
3
4
5
6
7
8
9
10
11
12</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="keyword">static</span><span class="normal"> </span><span class="type">void</span>
<span class="function">change_volume_state</span><span class="normal"> </span><span class="symbol">(</span><span class="usertype">GSimpleAction</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">action</span><span class="symbol">,</span>
<span class="normal">                     </span><span class="usertype">GVariant</span><span class="normal">      </span><span class="symbol">*</span><span class="normal">value</span><span class="symbol">,</span>
<span class="normal">                     </span><span class="usertype">gpointer</span><span class="normal">       user_data</span><span class="symbol">)</span>
<span class="cbracket">{</span>
<span class="normal">  </span><span class="usertype">gint</span><span class="normal"> requested</span><span class="symbol">;</span>
<span class="normal">  requested </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="./../glib/glib/glib-GVariant.html#g-variant-get-int32">g_variant_get_int32</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">value</span><span class="symbol">);</span>

<span class="normal">  </span><span class="comment">// Volume only goes from 0 to 10</span>
<span class="normal">  </span><span class="keyword">if</span><span class="normal"> </span><span class="symbol">(</span><span class="number">0</span><span class="normal"> </span><span class="symbol">&lt;=</span><span class="normal"> requested </span><span class="symbol">&amp;&amp;</span><span class="normal"> requested </span><span class="symbol">&lt;=</span><span class="normal"> </span><span class="number">10</span><span class="symbol">)</span>
<span class="normal">    </span><span class="function"><a href="GSimpleAction.html#g-simple-action-set-state">g_simple_action_set_state</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">action</span><span class="symbol">,</span><span class="normal"> value</span><span class="symbol">);</span>
<span class="cbracket">}</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

</div>
<p><br class="example-break">
</p>
<p>
The handler need not set the state to the requested value.  It
could set it to any value at all, or take some other action.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>simple</code></em> :</span></p></td>
<td>the <a class="link" href="GSimpleAction.html" title="GSimpleAction"><span class="type">GSimpleAction</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>the requested value for the state. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>user data set when the signal handler was connected.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 2.30</p>
</div>
</div>
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